Don't kill yourself going to all these (Although it does sound like fun)
Harbor Island would probaly be very good as it's a nice setting for shadowruns. I use it in my games all the time. Same with some of the terminals further south of the main waterfront.
What some call the "Darth Vader" building. You'll know it when you see it.
Hmm, just stumbled on this news story. How about a picture of thieves stealing copper from the link light rail?
http://www.seattlepi.com/local/article/Prosecutors-Men-stole-4-miles-of-copper-wire-4605699.phpThe floating bridges that carry I-90 and I-520 across Lake Washington to the Eastside.
The tunnel that you take from I-5 to go east on 520 and across Lake Washington. It's this weird and striking light yellow color. I think this tunnel would make a nice confined battle scene.
Mt. St Helens and the Ape Caves. This is in NAN lands and probaly is crawling with NAN shamans, especially in the lava tube that is the Ape Caves.
Snoqualmie falls. That entire road up to Snoqualmie has some great waterfalls to view as well.
https://www.google.com/search?q=snoqualmie+falls&tbm=isch&tbo=u&source=univ&sa=X&ei=gA7AUZqyLoKbiALlroCgCg&ved=0CEEQsAQ&biw=1024&bih=571Port Townsend has some good views, but is way out of the way, across the Sound by ferry.
It'll probaly be a good time of the year for views of Mt. Ranier.
Try riding the link light rail from Tacoma up to North Seattle. You'll see some areas you might not get a good look at otherwise from normal roads, including some run down areas.
If you want some Barrens flavor, perhaps try the Morrison.
http://www.thestranger.com/seattle/morrison-helltel/Content?oid=1720Ranier Beach in Renton is pretty run down too. Please be careful though.